PubAg

Main content area

You searched for: Journal Journal of polymer science Remove constraint Journal: Journal of polymer science Publication Year 2018 Remove constraint Publication Year: 2018 Source 2018 v.56 no.1 Remove constraint Source: 2018 v.56 no.1 Subject polymers Remove constraint Subject: polymers
Start Over

Search

13  Search Results

1 - 13 of 13
Number of results to display per page

Search Results

1. Charge transport and structure in semimetallic polymers Part B Polymer physics

Author:
Rudd, Sam; Franco‐Gonzalez, Juan F.; Kumar Singh, Sandeep; Ullah Khan, Zia; Crispin, Xavier; Andreasen, Jens W.; Zozoulenko, Igor; Evans, Drew
Source:
Journal of polymer science 2018 v.56 no.1 pp. 97-104
ISSN:
0887-6266
Subject:
X-radiation; electronics; methodology; molecular dynamics; polymers
Abstract:
... Owing to changes in their chemistry and structure, polymers can be fabricated to demonstrate vastly different electrical conductivities over many orders of magnitude. At the high end of conductivity is the class of conducting polymers, which are ideal candidates for many applications in low‐cost electronics. Here, we report the influence of the nature of the doping anion at high doping levels with ...
DOI:
10.1002/polb.24530

2. Disruptions in the crystallinity of poly(lauryl methacrylate) due to adsorption on silica Part B Polymer physics

Author:
Arua, Ugo N.; Blum, Frank D.
Source:
Journal of polymer science 2018 v.56 no.1 pp. 89-96
ISSN:
0887-6266
Subject:
Fourier transform infrared spectroscopy; adsorption; crystal structure; differential scanning calorimetry; glass transition temperature; heat flow; hydrophobicity; melting; polymers; silica
Abstract:
... The effects of adsorption of poly(lauryl methacrylate) (PLMA), a side‐chain crystalline polymer, on silica were investigated. Fourier transform infrared spectroscopy and differential scanning calorimetry (DSC) measurements were made on both bulk and adsorbed PLMA. The reversible heat flow rates were observed as a function of temperature and the degree of crystallinity of the samples determined bas ...
DOI:
10.1002/polb.24525

3. Electrical and melt rheological characterization of PC and co‐continuous PC/SAN blends filled with CNTs: Relationship between melt‐mixing parameters, filler dispersion, and filler aspect ratio Part B Polymer physics

Author:
Liebscher, Marco; Domurath, Jan; Krause, Beate; Saphiannikova, Marina; Heinrich, Gert; Pötschke, Petra
Source:
Journal of polymer science 2018 v.56 no.1 pp. 79-88
ISSN:
0887-6266
Subject:
carbon nanotubes; electrical resistance; equations; melting; mixing; polymers; viscosity
Abstract:
... Electrical and melt rheological properties of melt‐mixed polycarbonate (PC) and co‐continuous PC/poly(styrene–acrylonitrile) (SAN) blends with carbon nanotubes (CNTs) are investigated. Using two sets of mixing parameters, different states of filler dispersion are obtained. With increasing CNT dispersion, an increase in electrical resistivity near the percolation threshold of PC–CNT composites and ...
DOI:
10.1002/polb.24515

4. Facile synthesis of hyperbranched poly(p‐phenyleneethynylene‐alt‐m‐phenyleneethynylene) with narrow dispersity and high branching degree by sonogashira polymerization of an AB2 monomer Part A Polymer chemistry

Author:
Wang, Biyun; Tan, Qinglan; Lu, Jiang; Liang, Hui
Source:
Journal of polymer science 2018 v.56 no.1 pp. 96-104
ISSN:
0887-624X
Subject:
absorption; acetylene; molecular weight; organobromine compounds; organoiodine compounds; polymerization; polymers
Abstract:
... An AB₂ monomer PhBr₂CCPhCCH containing one acetylene group and two bromide groups was efficiently synthesized by a strategy based on the different reactivity between aromatic iodide and bromide in Sonogashira reaction. The Sonogashira polymerization of PhBr₂CCPhCCH was investigated to get hyperbranched poly(p‐phenyleneethynylene‐alt‐m‐phenyleneethynylene) (hb‐PMPE) in terms of the effect ...
DOI:
10.1002/pola.28875

5. Highly proton conducting proton‐exchange membranes based on fluorinated poly(arylene ether ketone)s with octasulfonated segments Part A Polymer chemistry

Author:
Xie, Yunji; Liu, Di; Li, Danqi; Han, Xiaocui; Li, Su; Chen, Zheng; Zhang, Haibo; Pang, Jinhui; Jiang, Zhenhua
Source:
Journal of polymer science 2018 v.56 no.1 pp. 25-37
ISSN:
0887-624X
Subject:
condensation reactions; hydrophobicity; ion exchange capacity; mechanical properties; polymers; relative humidity; water uptake
Abstract:
... A new bisphenol monomer containing a pair of electron‐rich tetra‐arylmethane units was designed and synthesized. Based on this monomer, along with commercial 4,4′‐(hexafluoroisopropylidene)diphenol A and 4,4′‐difluorobenzophenone, a series of novel poly(arylene ether ketone)s containing octasulfonated segments of varying molar percentage (x) (6F‐SPAEK‐x) were successfully synthesized by polyconden ...
DOI:
10.1002/pola.28857

6. Hydrophilic domain structure in polymer exchange membranes: Simulations of NMR spin diffusion experiments to address ability for model discrimination Part B Polymer physics

Author:
Sorte, Eric G.; Abbott, Lauren J.; Frischknecht, Amalie L.; Wilson, Mark A.; Alam, Todd M.
Source:
Journal of polymer science 2018 v.56 no.1 pp. 62-78
ISSN:
0887-6266
Subject:
cycloaddition reactions; equations; hydrophilicity; models; molecular dynamics; nuclear magnetic resonance spectroscopy; polymers
Abstract:
... We detail the development of a flexible simulation program (NMR_DIFFSIM) that solves the nuclear magnetic resonance (NMR) spin diffusion equation for arbitrary polymer architectures. The program was used to explore the proton (¹H) NMR spin diffusion behavior predicted for a range of geometrical models describing polymer exchange membranes. These results were also directly compared with the NMR spi ...
DOI:
10.1002/polb.24439

7. Improving waterproof/breathable performance of electrospun poly(vinylidene fluoride) fibrous membranes by thermo‐pressing Part B Polymer physics

Author:
Li, Xiang; Lin, Jinyou; Bian, Fenggang; Zeng, Yongchun
Source:
Journal of polymer science 2018 v.56 no.1 pp. 36-45
ISSN:
0887-6266
Subject:
abrasion resistance; crystal structure; fluorides; high pressure treatment; polymers; synergism; temperature; tensile strength
Abstract:
... Facing the ever‐increasing demand for waterproof/breathable materials, a rapid and efficient fabrication method of these functional materials with excellent performance as well as robust mechanical properties remains challenging. Herein, a simple and scalable strategy referred to as thermo‐pressing is introduced to improve the waterproof/breathable performance and mechanical properties of electros ...
DOI:
10.1002/polb.24534

8. Molecular weight dependence of carrier mobility and recombination rate in neat P3HT films Part B Polymer physics

Author:
Dixon, Alex G.; Visvanathan, Rayshan; Clark, Noel A.; Stingelin, Natalie; Kopidakis, Nikos; Shaheen, Sean E.
Source:
Journal of polymer science 2018 v.56 no.1 pp. 31-35
ISSN:
0887-6266
Subject:
crystallites; electric power; electrons; microstructure; molecular weight; polymers
Abstract:
... The microstructure dependence of carrier mobility and recombination rates of neat films of poly 3‐hexylthyophene (P3HT) were determined for a range of materials of weight‐average molecular weights, Mw, ranging from 14 to 331 kDa. This variation has previously been shown to modify the polymer microstructure, with low molecular weights forming a one‐phase, paraffinic‐like structure comprised of chai ...
DOI:
10.1002/polb.24531

9. Semi‐perfluoroalkylated perylene diimides for conjugated polymers with high molecular weight and high electron mobility Part A Polymer chemistry

Author:
Cai, Chunsheng; Wan, Ji; Zhang, Youdi; Yuan, Zhongyi; Huang, Qingfang; Xu, Guodong; Hu, Yu; Zhao, Xiaohong; Chen, Yiwang
Source:
Journal of polymer science 2018 v.56 no.1 pp. 116-124
ISSN:
0887-624X
Subject:
moieties; molecular weight; polymers; semiconductors; solubility
Abstract:
... Perylene diimides (PDIs) and their derivatives are excellent semiconductors, while conjugated polymers based on PDIs have limited applications because of their low electron mobility (μₑ) derived from low molecular weight. The reported maximum number‐average molecular weight (Mₙ) of related polymers is only 21 kDa because PDIs have very poor solubility due to strong π–π stacking of their big planar ...
DOI:
10.1002/pola.28880

10. Synthesis of a bio‐inspired catechol/phosphorylcholine surface modifier and characterization of its surface properties Part A Polymer chemistry

Author:
Zhang, Yucheng; Hirai, Tomoyasu; Ma, Wei; Higaki, Yuji; Kojio, Ken; Takahara, Atsushi
Source:
Journal of polymer science 2018 v.56 no.1 pp. 38-49
ISSN:
0887-624X
Subject:
Lewis bases; adhesion; biofouling; catechol; durability; humans; hydrophilicity; inflammation; mechanical properties; pH; phosphates; polymers; stainless steel; van der Waals forces
Abstract:
... Biocompatible and blood‐compatible surface modification is urgently needed for stainless steel (SUS)‐based human implant devices to avoid inflammation and biofouling. To this end, the use of polymeric surface modifiers, whose surface properties are specifically tailored, is a promising approach since this approach minimizes the impact on device's mechanical properties. However, adhesion between th ...
DOI:
10.1002/pola.28858

11. Synthesis of star‐shaped poly(n‐butyl acrylate) oligomers with coumarin end groups and their networks for a UV‐tunable viscoelastic material Part A Polymer chemistry

Author:
Honda, Satoshi; Tanaka, Nobuaki; Toyota, Taro
Source:
Journal of polymer science 2018 v.56 no.1 pp. 9-15
ISSN:
0887-624X
Subject:
adhesives; coumarin; dimerization; dissociation; irradiation; mixing; photochemistry; polymers; viscoelasticity; wavelengths
Abstract:
... Solvent‐free isothermal tuning of viscoelasticity of polymer materials is important for an emerging photochemical molding technology and photoreversible adhesives. In this study we designed a four‐armed star‐shaped poly(butyl acrylate, BA) oligomer having four coumarin end groups. The irradiation of UV at the wavelength of 365 nm (UV₃₆₅) to the viscous poly(BA) oligomer under a solvent‐free condit ...
DOI:
10.1002/pola.28777

12. Tailoring the mechanical properties of nanoparticle networks that encompass biomimetic catch bonds Part B Polymer physics

Author:
Zhang, Tao; Mbanga, Badel L.; Yashin, Victor V.; Balazs, Anna C.
Source:
Journal of polymer science 2018 v.56 no.1 pp. 105-118
ISSN:
0887-6266
Subject:
biomimetics; computer simulation; deformation; equations; guidelines; models; nanocomposites; nanoparticles; polymers; tensile strength
Abstract:
... Biological “catch” bonds display the distinctive attribute that the bond lifetime can increase under an applied force. Insertion of biomimetic catch bonds into hybrid materials could lead to composites that exhibit remarkable mechanical properties. We model the tensile behavior of polymer‐grafted nanoparticle (PGN) networks interconnected by a mixture of catch bonds and conventional “slip” bonds, ...
DOI:
10.1002/polb.24542

13. Thermal actuation of hydrogels from PNIPAm, alginate, and carbon nanofibres Part B Polymer physics

Author:
Warren, Holly; in het Panhuis, Marc; Spinks, Geoffrey M.; Officer, David L.
Source:
Journal of polymer science 2018 v.56 no.1 pp. 46-52
ISSN:
0887-6266
Subject:
alginates; carbon nanofibers; compression strength; electrical conductivity; hydrogels; liquids; polymers; robots; temperature; water content
Abstract:
... Composite ionic‐covalent entanglement (ICE) hydrogel networks were prepared from poly(N‐isopropylacrylamide), alginate, and carbon nanofibres. An optimised triple network hydrogel with 86% water content exhibited a compressive strength of 3.0 ± 0.1 MPa and 66 ± 13 mS/cm electrical conductivity. Thermal actuation was shown to have a shorter response time for gels containing nanofibres, compared to ...
DOI:
10.1002/polb.24430